open source - Are there any implemented game controls like a screen (thumb) joystick? - iOS

I'm looking for some open source game controls. Especially I'm looking for a thumb screen joystick to move a character on the screen, something like a touch circle.

Are there any open source implementation of what I'm looking for?

Answer

There's a button and virtual joystick implementation for cocos2d called "SneakyInput". Here's a tutorial that might help you use it.